Double Grammy award-winning crooner Jack's passing was announced on Wednesday night to The Hollywood Reporter by his stepdaughter Nicole Whitty.
The outlet said he passed away at Eisenhower Medical in Rancho Mirage, California, after a two-year battle with leukaemia.
Once billed as Frank Sinatra's heir and best known for his Love Boat theme performance, Jones was also famed for his early Sixties pop hits including Lollipops and Roses, and Wives and Lovers.
As well as his singing career he was an actor, making cameos as a lounge singer in 1982's Flying High II: The Sequel and American Hustle in 2013.
Born John Allan Jones in Los Angeles on 14 January, 1938, he also had a showbiz mother - Irene Hervey, whose film and television career spanned five decades.
Jones - who was married six times – told Las Vegas Magazine in 2016 about his singing career being guaranteed by the success of his famous TV theme: "Because of The Love Boat theme, everything was great on ships after that.
"I did six weeks a year. They gave me the best suite on the ship, and it was the SS Norway.
"We just had a great time."
Jones brought out The Love Boat Theme as a single in 1979.
He got his start performing at the Thunderbird Hotel and Casino in Las Vegas, Nevada and in 1959, he signed with Capitol Records and released his debut album This Love Of Mine.
Lollipops And Roses came out in 1961 and landed Jones his first Grammy for Best Solo Vocal Performance, Male.
His 1963 single Wives And Lovers, written by Burt Bacharach and Hal David, got him his second Grammy.
From 1967 to 1969, he was married to actress Jill St John, and in 1970 he wed Gretchen Roberts.
He then said "I do" to Kathy Simmons - his wife from 1976 to 1982 - before he tied the knot with Kim Ely in 1982. They split in 2005.
Jones and Ely had daughter Nicole in 1991, and the singer also has a daughter called Crystal Thomas from his marriage to Lee Fuller.
Jones spent his last years living with his sixth wife, Eleonora.
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